If f(z) = limto la+sin mal+1 la-+sin alr e (0,6), then (1) ifa = 1, then f(z) has 5 points of discontinuity (2) ifa = 3, then f(r) has no point of discontinuity

If f(z) = limto la+sin mal+1 la-+sin alr e (0,6), then (1) ifa = 1, then f(z) has 5 points of discontinuity (2) ifa = 3, then f(r) has no point of discontinuity (3) ifa = 0.5, then f(7) has 6 points of discontinuity (4) ifa = 0, then f(r) has 6 points of discontinuity